Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...304..365c&link_type=abstract
Astronomy and Astrophysics, v.304, p.365
Astronomy and Astrophysics
Astrophysics
19
Stars: Evolution, Stars: Horizontal Branch, Galaxies: Individual: Leo I, Galaxies: Evolution, Galaxies: Stellar Content
Scientific paper
We show that the observed spread in magnitude of He-burning stars clumping along the red giant branch in not-too-old metal poor stellar clusters can be used to get an upper limit for the cluster age. As a result we find that the dwarf spheroidal galaxy Leo I appears even younger than previously suggested, with an age lower or of the order of 2.0Gyr. Firmer conclusions will be reached when detecting the cluster main sequence turn-off which is expected in the range of V=24-24.3mag, depending on the actual cluster age.
Caputo Filippina
Castellani Vittorio
Degl'Innocenti Scilla
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